448 Messrs. J. Wood-Mason and A.. Alcock on 



valve, and an anterior tooth in tlie form of a broad and stout- 

 based projecting massive hook, which is received into a notch 

 of tlie left valve lying beneath the umbo between the liga- 

 mentary fossa and the lunule. Except for a mere film joining 

 the valves externally in the usual position the ligament is 

 internal. A stout, convex, posteriorly-bifid ossicle connects 

 the ligaments of the valves with one another. 



Most striking is the curious lunule, which suggests in-turned 

 ears. 



A fine living specimen from Station Ho, 188 to 220 

 fathoms, measuring in length 37 millim., in height 33'2 

 millim., and in thickness 2G'8 millim. 



21. Vei-ticorch'a, sp. 

 From the Bay of Bengal, in 1997 fathoms. 



Family Tellinidae. 



22. Telhna, sp. 



Two species were dredged, one from the Bay of Bengal at 

 561 fathoms, the other from 922 fathoms in the Andaman 

 Sea. 



Subgrade CCELENTERATA. 



Piiylum NEMATOPHORA. 



Class SCYPHOMEDUS-E. 



Order P E R O M E D U S iE. 



Family Periphyllidse. 



Peeiphylla, Steenstrup. 



1. Periplii/Ua, sp. 



A large species, with the internal organs rather ragged, 

 from Station 120, 240 to 276 fathoms. 



Order DISCOMEDUS^. 



Family Ephyridae (CoLLAsriD^). 



AtOLLA, lli\?ckel. 



2. AtoUa WyviUii, Ilceckel. 



Atolla JJ/yr////, ITacliol. ' Clinllenjror ' Deep-soa IMoaus;^. pp. 113-11% 

 pi. xxix. 



